To reseal or not to reseal 120g.

[Guygettnby]

Made the decision to buy a used 120g AGA RR tank. Was a tough call to make being as this tank is 20 year's old.... oldest tank I have ever bought, but it was a killer deal at $380 for the whole setup. The tank was still running and holding water when I got there. All the structural seams look perfect and not a single flaw. The inside corner seals are chewed up some, which is to be expected with a tank this old. Now I'm looking into cutting them out and resealing it, not taking the entire tank apart as everything is still holding great and no signs of anything wrong.

This will be my 1st attempt at resealing a tank... i was 100% confident that I could do it, but now I'm questioning some things. I can not find 1 single video or real discussion on resealing a reef ready tank with over flows. I'm going to remove the 2 over flows, but reinstalling them leaves me with questions. The silicone won't attach to itself, so do the overflows have to be done at the same exact time? I want everything to be completely sealed and done correctly. Over 20 years in this hobby and never once doing this, I feel like a complete noob right now.

I am also curious if I should even bother doing this or not being as I know it is not leaking and still in very decent shape for it's age, but I expect to have this tank for many years and I'm in no rush to set it up. Any insight or pointers here from members who have expertise in this would be great.

 

[griss]

I can’t speak to the overflow part as I’ve never resealed overflows. My gut tells me, reseal the tank, let the silicone cure and then reinstall/reseal the overflows. @wvned any thoughts?

However, in the early 90s I did reseal a 200 Oceanic (non-reef ready tank) I inherited from my parents divorce. The most difficult part was getting the old silicone out. But, applying the new silicone was pretty easy.

 

[Guygettnby]

I can’t speak to the overflow part as I’ve never resealed overflows. My gut tells me, reseal the tank, let the silicone cure and then reinstall/reseal the overflows. @wvned any thoughts?

However, in the early 90s I did reseal a 200 Oceanic (non-reef ready tank) I inherited from my parents divorce. The most difficult part was getting the old silicone out. But, applying the new silicone was pretty easy.

The overflow part is what stumped me for a minute. I feel the removal and installation of the new silicone won't be an issue for me. I had thought about installing the overflows after everything has cured, but then the overflows might not sit properly or 100% seal. Could notch the bottom corner alittle for fitment if needed, but the silicone won't adhere to the bottom seal and possible leak there in the future.

 

[wvned]

I have never resealed a tank. If the overflows have standpipes, it won't matter if they leak a bit.